A4490EES-T Equivalent & Substitute Parts

Part Overview

The A4490EES-T is a buck switching regulator IC manufactured by Allegro MicroSystems, designed for positive adjustable output applications. This device integrates three independent step-down regulators with adjustable output voltage ranging from 0.8V to 30.6V, operating from a 4.5V to 34V input supply. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for production and field support.

Substiute Parts

A4490EES-T

Allegro MicroSystemsIn Stock: 1130A4490EES-T Datasheet

Current PartRFQ

A4490EESTR-T

Allegro MicroSystemsIn Stock: 18948A4490EESTR-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A4490EES-T is determined by strict equivalence across the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator with three independent outputs
• Output Configuration: Positive adjustable voltage
• Voltage Specifications: Input range 4.5V to 34V; output range 0.8V to 30.6V
• Switching Frequency: 550kHz
• Package: 20-WFQFN Exposed Pad (20-QFN-EP 4x4)
• Thermal Range: -40°C to 85°C operating temperature
• Regulatory Compliance: RoHS3 compliant, REACH unaffected

The A4490EESTR-T meets all these criteria and is classified as an active product, making it a direct functional equivalent suitable for replacement in applications currently using the A4490EES-T.

Parameter Comparison

Engineering Selection Recommendations

The A4490EESTR-T is the direct equivalent replacement for the A4490EES-T. Both parts share identical electrical specifications, package geometry, and thermal operating range. The primary distinction is product status: the A4490EES-T is obsolete, while the A4490EESTR-T maintains active production status with significantly higher inventory availability (18,920 units versus 1,057 units).

Both parts maintain full RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and production continuity. The A4490EESTR-T is supplied in Cut Tape and Digi-Reel packaging formats, supporting both prototype and high-volume manufacturing workflows.

Frequently Asked Questions (FAQ)

Q: Can the A4490EESTR-T be used as a direct replacement for the A4490EES-T?

A: Yes. The A4490EESTR-T is electrically and mechanically identical to the A4490EES-T across all specified parameters, including voltage ratings, switching frequency, package type, and thermal range. No circuit modifications are required.

Q: What is the difference between these two part numbers?

A: The A4490EES-T is obsolete with limited remaining inventory. The A4490EESTR-T is the active equivalent with full production support and substantially higher stock levels. Both parts are manufactured by Allegro MicroSystems and share the same base product number (A4490).

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance and REACH unaffected status. Moisture sensitivity levels differ slightly (MSL 1 for A4490EES-T versus MSL 2 for A4490EESTR-T), but both are suitable for standard PCB assembly processes.

Q: What packaging options are available for the substitute part?

A: The A4490EESTR-T is available in Cut Tape (CT) and Digi-Reel packaging, accommodating both manual assembly and automated pick-and-place operations.

Q: Is the 20-WFQFN Exposed Pad package the same for both parts?

A: Yes. Both parts use the identical 20-QFN-EP (4x4) package with exposed pad, ensuring PCB layout and thermal management characteristics remain unchanged during substitution.